Stacking
GHRP-2 + CJC-1295 (no DAC) / Mod GRF 1-29
This is the most widely used combination. The GHRH analog primes the pituitary somatotrophs while GHRP-2 amplifies the release signal through a separate receptor pathway, producing synergistic GH output that exceeds either agent alone by two to three times. See the peptide stacking guide for practical protocols combining these compounds. Typical dosing is 100 to 200 mcg of each peptide administered simultaneously in the same syringe, one to three times daily.
GHRP-2 + CJC-1295 (with DAC)
CJC-1295 with DAC has an extended half-life of approximately six to eight days, providing sustained baseline GHRH stimulation. Adding GHRP-2 injections on top of this creates acute GH pulses superimposed on a chronically elevated GHRH signal. This approach requires less frequent CJC-1295 dosing (once or twice weekly) but maintains daily GHRP-2 injections.
GHRP-2 + GHRH for Diagnostic Synergy
In clinical research settings, the combination of GHRP-2 with GHRH has been used as an enhanced provocative test for GH deficiency, leveraging the synergistic release to improve diagnostic sensitivity. The Mericq et al. (1998) pediatric study included a combined GHRP-2 + GHRH treatment arm that produced the highest GH responses observed.
When stacking, standard GHRP-2 dosing is maintained while the complementary peptide is added at its own standard dose. Timing rules (empty stomach, pre-bed priority) apply to both peptides.